Sorry, Sue, but I absolutely must correct you when you say "Before 1911, the census form was completed by the enumerator". This is simply not true.

From 1841 onwards, the census was conducted, as it still is, by the delivery of schedules (forms) to individual households in advance of "census night" and the subsequent collection by the enumerator of forms completed by the Head of the Household (or whoever the Head got to do it).

From 1841 to 1901, the information from these individual forms was then transcribed, as best he could, by the enumerator into his Enumerator's Books which were then sent to the Registrar General whose clerks "crunched the numbers" to provide the statistical information which was the purpose of the census. It is these Enumerator's Books that we are looking at today when we search the census from 1841-1901.

In 1911, thanks to improved technology, it was possible to dispense with the laborious process of transcribing the information from census schedules to Enumerators' Books prior to statistical analysis. From that census on, the analysis used the original household schedules as its raw material. This is why the schedules were kept and thus why we can see them today when we search the 1911 census.

I know this sounds picky, but it is really important that people, especially newcomers and especially those from other countries where things are done differently, understand how the records on which we depend were created.